Speed indicator



June 19, 1923. 1,459,292

' A. MLOTTE n SPEED INDICATOR Filed. June 26, 1922 Patented June 19, i923.

UNITED srrss ALFRED MLOTTE, or REMICOURT, BELGIUM. i

l SPEED l INDICATOR. l

Application filed June 26, 1922.

' 'To all 107mm t may concern.'

' Be it known .that I, ALFRED MLOTTE, subject of the King of Belgium,'residing at lemicourt, in the Kingdom of Belgium, have invent-ed certain new and yuseful Improvements in or Relating to Speed Indicators, of which the following is a specification. y

yThis inventionA relates to an apparatus for indicating speed by means of sound, comprising a ball which is movable inside a rotary bell. i i In apparatus of this kind as hitherto used, the ball, which was yarranged in a radial groove of a plate rigidly connected rwith the bell, had during the rotation ofthe lat# ter, an alternating movement` due to the action of gravity so long as the centrifugal force due to the movement of rotation ofthe above-mentioned bell did not throw the ball against` the wall of the bell. l

Such arrangements based upon the action of the centrifugal force necessitate a vfairly high'speed ofthe rotation in order to hold the ball against vthe wall of the bell. l It follows that in order to permit `the apparatus to be used with low speed'machinery such as creamseparators, it is necessary that it be placed at a certain distance from the rotating shaft, i. e., upon the driving handle.

According to the present invention, the motion of the ball which gives the speed indication is due to gravity alone, and the apparatus may be placed upon the hub of the driving shaft. To this end the ball is carried around at each revolution by means of a member rigidly connected with the bell, then is abandoned to itself. The said carrying member may consist, for instance, of a blade arranged inside a. drum in which the ball is displaced.

According to the more or less high speed of rotation of the bell, which is rigidly connected with the shaft of the machine, the ball falls at various points of the periphery of the bell. By placing a non-sonorous body in different suitably chosen points of the periphery, the impact of the said ball will produce a sound only for certain well predetermined points of fall corresponding to known speeds.

According to another mode of carrying the invention into effect, the bell may be provide-d with several members for driving the ball, which members act successively upon the ball in such a manner that it falls several y serial Nc. 570,900.

hejaccompanying drawings illustrate by Way .ofiexampletwo modes of carrying the invention into eect. l

Figures 1, 2, 3 and 4 'are diagrams of the timesupon the bell during each' revolution.

apparatus showing the successive positions of the ball Fig. 5 is struction. I i

Fig. 6 is afsection of the apparatus along the line A-B of Fig. 7. p Fig. 7 illustrates asection of the apparatus along the line Ce-D of Fig. 6.f

Fig. 8 illustrates a sectional view of the second construction. l As shown more particularly in Figs. 1 to 4, the ball 1 rolls freely against the wall `of the rotating drum 2, which is its'inside with a blade 3 (see Fig. 1).` When the drum rotates in the direction induring the rotation of the drum. a perspective view vof one con# provided on dicated :by the arrow, Ithe ball is raised yby the lblade until "the latter rima.

l s the rotation of the drum continues, the blade becomes inclined and allows the ball to escape by rolling to the end .of the blade where it falls off and drops down upon the bottom wall of the drum, following aline which is practically vertical.l As `the rotation of the drum free fall of the ball, it is easily understood is horizontal (see still continues vduringthe that, as shown in Figs. 3 and 4, the ball will fall on different points of the wall of the drum according to the more or less high speed of rotation of the latter.

It is by choosing the point of the drum for which the fall of the ball gives a sound that the arrangement shown in the diagram permits of giving a speed indication.

According to the mode of construction which is illustrated in Figs.v 5, 6 and 7, the apparatus consists of a, plate 5, on which is Xed a straight part 7. The said straight part 7 forms the blade which raises the ball 14; and in the case of its application to an apparatus for working at given speeds, there are no,

a drum comprising a curvedy part 6 and ,two notches or openings resilient lugs 12 and 13, which embrace rei spectively thev shaft 11 and the crank Orhandle 15.

According to another mode of construction illustrated in Fig. 8, the drum comprises two straight Walls 17 and 18 acting as blades the ball 16. As the 19 and 2O are not symmetrically arranged 4relatively to the axis X Y', the ball will fall into each of them only for different .speedsleaving between and lifting successively them a speed for which the ball will not fall f into either of the 1. An apparatus for indiczating speed by means .of sound, comprisingv a rotary shaft;

body mounted thereon; a hollow non-resonant bodywithin the interior of the resonant body fixed to said shaft to rotate ltherewith and having at lea-st one outlet opening; and an impact body vfreely rotatable within the non-resonant body and a hollow resonant v adapted to escape through said opening and fall against the resonantv body when said shaft and said non-resonant body are rotating at speeds lower'than a predetermined speec. l p.

2. An apparatus for indicating speed by means ofsound, comprising a drum provided on its inside with a blade carryingca ball and abandoning it tof itself after it has been lifted to a certain angle; the said ball, when falling, striking the periphery of the said drum at a point at which depends on the speedof rotation of the said drum which is protected at certain parts of the circumference against the shock of the bail by means of a non-sonorous body.

3. An apparatus for indicating speedby means of sound, comprising a drum provided on its inside with vseveral driving members carrying a ball and abandoning it to itself after it has been lifted to a certain angle; the said ball,when falling, striking the periphery of the said drum at a point which dependsl on the speed of rotation of the said drum.

4. An apparatus for indicating speed by means of sound, com rising arotary shaft; a hollow resonant body mounted thereon; a hollow non-resonant body within the interior of the resonant body fixed to said shaft to'rotate therewith and having at least one blade and one outlet opening; and an impact body freely-rotatable v, within the nonresonant body and adapted to be lifted upfby said blade and then to be dropped therefrom when the blade reaches a `certain angular position, yand t escape. through said open ing and fall against the resonant body when said shaft andsaidenon-resonant body are rotating at speeds lower than a predetermined speed. v

In testimony whereof I" affix my signature.

y y 1 ALFRED MELQTTE; Titnessesz l i GEORGES VANDER HOEGHEN,

V LEoNAED LEnoN. 

